Lateral-motion car-truck.



W. H. WLsoN. LATERAL MOTION OAR TRUCK.

APPLICATION FILED NOV.4, 1911.

120579990., Patented Apr. 1,1913

2 SHEETS-SHEET l.

W. H. WILSON.

LATBRAL MOTION GAR TRUCK.

APPLICATION FILED 1101/14, 1911.

1,057,990. v Patented Apr. 1, 1913.

bearing 6 is, as shown, set in the ends of the bolster 1, and partakes of endwise movements of the bolster transversely of the truck. The bolster, as is usual in this type of truck, works between the columns 3 and is provided with suitable stop lugs 7 that engageV said columns and limitthe endwise movements of said bolster transversely of` the truck. i

The rockers illustrated in Figs. 1 and 2 are each made up of a spring base 8,l a spring cap 9, and a group of coiled springs 10 interpos'ed between the said parts 8 and 9, to* hold the saidsprings against displacement with respect to the members -8 and 9. Said parts are preferably formed with centering lugs 11 that telescope into the ends of the said s rings. AThe sprin bases 8 are formed n with fulcrumed ribs or ugs 12 that extend longitudinally of the truck side frames and are seated in grooves 13 formed in the lower rocker bearing 5. The spring cap 9 is provided on top with two 'laterally spaced fulcrumed ribs or lugs 11i that normally engage rooves or seats 15A formed on the undersi e of the overlyingupper rocker bearing 6. The said fulcrumed lugs or ribs 12 and 14 constitute the so-called three bearing points of the rocker, and it will be noted that the bearing point 12 is located in a v ertical plane that extends midway between the bearing points 14.' With this arrangement, it is obvious that gravity will exert a very considerable force tendine'r to maintain the rockers in their intermediate positions to the truckbolster centered. Excessive force.

will, however, oscillate the rockers and permit such endwise movements of vthe truck bolster as are emitted by the stop lugs 7.

46 The said stop ugs 7, of course, limlt the extreme endwise movements of the truck bolster, By incorporating the bolster 'supporting springs in the lateral motion rockers, a ver `simple and compact construction is provi ed. y

With the construction just described, excessive endwise movements of the truck bolster will bring the spring base 8 and spring cap 9, respect1vely, into contact with thev cooperating bearings 5 and 6, at points marked y on Fig. 2, and the springs 8 are thus further uti ized to cushion extreme movements of the said bolster. v

In the modified construction illustrated in Fig. 3, the lower rocker bearing 5a is provided with a flat seat that is engaged by a bearing point or lug 12 of the spring base 8a; and 1n this construction, the bottom of the lug 12a is given a long curve and is made in the form of a rocker so that when the spring base 8L is oscillated, there will be a rocking action in which the point of contact between the said members 12 and 5 shifts. This iiattened fulcrumed lug and the rolling e5 action thereby produced increase Athe tendbottoms of the pockets 17 formed in the said -spring caps 10a; At their upper ends, these 4bearinv -6.. 1n this construction, as is eviessary addition were made, the device would ency of the rocker to remain in normal poe 'sition and to return to normal position after having been moved out of center.

' 1n the construction illustrated in Figs. 4 and 5,the above noted parts 1, 2, 3, 4, and 6 are employed, but the spring base 5a is rested directly on 'the saddle` plate 2, and the spring cap, between which and the said'base the springs 10 are interposed, is -guided for vertical movements by the columns 3. The three-point rockers 16 in this construction are inte al or solid metal structures, whichv are pre erably arranged in pairs and the lower ends of'which are engaged with the rockers `16 are provided with two-point contacts or bearings` 18 that normally engage seats in the underside of the upper rocker dent, t e so-called spring cap 10 also serves 85 as a lower rocker bearing. Preferably, the lower ends of the rocker 16 are somewhat iiattened so as to increase the tendency of the said rockers to maintain centered or intermediate normal positions. However, the said rockers, at their lower ends, may be provided with rounded bearing heads 17, as shown invFig. 6, and which are simply made to oscillate in the cooperating bearing pockets 17. l

Preferably, the two-point bearings are 1ocated at, the upper extremities of the rockers and -the third-point bearing at the lower extremities of said rockers, but it is obvious that it would be within the scope of this invention, as herein disclosed and de- 4lined in the claims, to invert said parts or reverse the said relation thereof. If a fourth bearing point were to be added to that end of the rocker which is designated as having a single-point-contact, one or the other thereof would be an unnecessary and undesirable element; but even if this unnecstill involve the three-point rocker. lFurthermore, the best loperative arrangement is provided by the use of only three bearing ,pointson contacts on the rocker.

What l claim is:

1. In-a'truck, the combination with side frames and a truck bolster, of a lower bearing partaking of the lateral movements of said side frames, upper bearings partaking of the endwise movements of the `truck'bol- 120 ster transversely of the truck, and threepoint lateral motionl rockersinterposed between said bearings.

2. In a truck, the combination with side frames and a truck bolster, of lower bear-l 125 ings partaking of the lateral movements of said side frames, upper bearings partalring of the endwise movements of said. bolster transversely of the truck, and lateral motion y:rockers interposed between said upper and 3.30

Loeneeo .side frames, upper bearings partaking of the endwise movements of said bolster transversely of the truck, and lateral motion rockers interposed between said upper and lower bearings and having two-po1ntcon tats with said 'upper bearings and Aonepoint-ontaets with said lower bearings, the said single-pointcontacts having a rocking or traveling engagement withY said lower bearing, substantially as described.

4. In a truck, the combination with truck side frames anda truck bolster, of lower bearings partaking of theV lateral movements` of said side frames, upper bearings partak-y ing of the endwise movements of the bolster, and three-point lateral motion rockers interposed between said upper and lower bearings and comprising each, a spring base, a spring cap and interposed springs, substantially as described.l i

5. In a truck, the combination with truck side frames and a truck bolster, of lower bearings partaking of the lateral movements of said side frames, upper bearings partakin of the endwise movements of the said bo ster transversely of the truck, and lateral motion rockers interposed between said upper and lower bearings and each comprising a `spring base, a spring zap and interposed springs, said spring caps having two-point-` oontacts with said upper bearings, and said spring bases having single-point contacts with said lower bearings.

6. In a truck, the combination with truck side frames and a truck bolster, of lower bearings partaking of the lateral movements of said side frames, upper bearings partaking of the endwise movements of the said bolster transversely of the truck, and lateral motion rockers interposed between said upper and lower bearings and each comprising I a spring base, a spring cap and interposed springs, said spring caps having twopoint contacts engaeable with saidupper bearings, and sai spring bases having singlepo1nt-contacts with said lower bearings, the said single-point-contaets having arocking or traveling engagement with said lower bearings, substantially as described.

In testimony whereof I atiix my signature in presence of two witnesses. WILLIAM I-I. WILSON.

Witnesses:

F. D. MERCHANT, HARRY D. KILooRE. 

